Ultra 10 Core with 2 Ply, Polyester- Metalized Polyester. Very versatile air connector product capable of performing in a multitude of low to medium pressure residential or commercial HVAC applications. Well suited for main trunk lines, supply and return lines, connecting lines, as well as runs to diffusers and room registers, and other terminal devices in spaces where insulation is not required. It also is perfect venting and exhaust applications. Do not use for the venting of cooking and clothes drying appliances unless approved and recommended by the appliance manufacturer. The outer layer of this polyester film is also metalized for aesthetics. UL Rated Operating Temperature: -20 degreeF up to 180 degreeF, -29degreeC up to 82degreeC.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov